i have been using camera raw for 1 yr. great no problems, my computer crashed and had it reworked at my repair guys. all adobe was removed in the process. i reloaded my same discs from last year, cs4 will not read my canon 5dmark 2 compact flash files. it is fine all other ways. i shoot in raw on the camera. 2 weeks ago all was good. i have a wedding that needs to be processed and i cant read the any of the past year's raw files.